360 V. S. p. E. E. EXP. AND StTRVETS—^ZOOLOGY—GENEEAL EEPOET. this name described on page 59, and there called likewise Thryothorus arundineus, is the Certhia palustris of Wilson. The bird he described in 1807 as " Troglodyte des roseaux," or Troglodytes arundinaceus, is as certainly Sylvia ludoviciana of Latham. Vieillot unquestionably knew the latter species in 1816, as he had described it in 1807, although its biography of that date belonged to the first mentioned bird. For this reason, therefore, in the necessary uncertainty of the case, I am inclined to differ from Gray, and to consider the Sylvia ludoviciana as the type, especially as the necessity of a new generic name will thereby be avoided. Synopsis of spedes. Tail feathers light brown, with bars of black. Superciliary stripe extending far hack on the neck, and spotted with black. Tail about equal to the wings. Lateral tail feather a quarter of an inch shorter than longest. Above, reddish brown ; beneath, pale yellowish rusty ; sides plain T, ludovidanus. Lateral tail feathers half an inch shorter than longest. Above, reddish brown ; beneath bright reddish brown on the sides and behind ; sides obsoletely barred...5^. berlandieri. Lateral tail feathers black, varied with white. Superciliary stripe confined to the neck. Tail longer than the wings T. bewickii. Comparative measurements of species. Catal. No. Species. Locality. Sex. Length. Stretch ofwings. Wing. Tail. Tarsus. Middle toe. Its claw alone. Bill above. Along gape. Specimen measured. Thriothorus ludovicianus. do Thriothorus berlandieri.. do 5.40 5.70 4.80 5.52 5.20 5.25 5.54 5.00 5.50 5.10 4.80 4.60 4.92 4.10 4.75 4.44 4.90 5.50 4.56 3.50 3.92 3.98 3.70 4.40 4.92 4.90 5.50 4.12 4.42 7.25 7.25 7.33 6.83 5.75 7.00 5.92 6.00 6.75 5.83 2.36 2.34 2.20 2.25 2.16 2.25 2.34 2.18 2.25 2.08 2.12 2.00 2.08 1.88 1.75 2.04 2.0G 2.36 2.10 2.14 0.80 0.84 0.84 0.78 0.76 0.74 0.20 0.20 0.22 0.66 0.64 0.74 0.86 0.80 0.84 10204 7123 do. South Illinois ,,, Boquillo do .,„„ Skin Skin 7122 do. do do do do 9 2.22 0.78 0.73 0.20 0.64 0.76 Skin Thriothorus maculipectus^ Thriothorus bewickii do 2.14 2.44 0.86 0.71 0.76 0.68 0.20 0.20 0.70 0.56 0.78 0.68 2047 Carlisle, Pa.,..,., do 3 Skin 7132 9119 do Thriothorus leucogastra .. Troglodytes aedon do Cosumnes river.. 3 3.32 2.22 1.94 0.73 0.73 0.68 0.66 0.68 0.64 0.18 0.18 0.14 0.60 0.58 0.50 0,74 0.72 0.64 Skin Skin 1084 do. Carlisle, Fa do 3 Skin do do 1.90 0.66 0.58 0.15 0.51 0.64 do. do 7135 7136 do. Troglodytes parkmanni... do do Fort Steilacoom.. do do o 3 2.10 2.12 0.66 0.66 0.63 0.64 0.16 0.16 0.44 0.54 0.56 0.70 Skin Skin.,... 2951 1.93 1.78 1.66 1.76 1.82 1 80 - 1.92 2.06 2.08 1.72 1.75 1.88 1.26 0.66 0.64 0.62 0.58 0.16 0,14 0.52 0.42 0.62 0.56 Skin 1379 Troglodytes hyemalis do Carlisle, Pa do 9 "q" 9 Skin 10206 9216 1556 do Troglodytes europaeus ... Cistothorus palustris do WestNorthlieldjIll Ntirnberg Carlisle, Pa do 1.32 1.38 1.74 0.66 0.68 0.76 0.60 0,62 0.66 0.16 0.16 0.20 0.40 0.44 0.52 0.55 0.54 0.70 Skin Skin Skin do 3 o 2.00 0.80 0.72 0.21 0.62 0.76 do. do Cistothorus stellaris do do do do 1510 do. 1.70 0.64 0.56 0.14 0.40 0.50 Skin 1 Thryothorus maculipectusj Lafr> Rev. Zool. 1845,333.